钾素营养对高寒区白萝卜养分吸收及产量的影响  

Effect of Potassium on Biomass and Nutrient Absorption of Radish in the Northwest Plateau of Hebei Province

作　　者：赵光辉[1] 张立峰[1,2] 左启华[1,2] 王新路[1] 窦铁岭[1,2] 边秀举[1] 

机构地区：[1]河北农业大学农学院,河北保定071001 [2]农业部张北农业资源与生态环境重点野外观测试验站,河北张家口076450

出　　处：《北方园艺》2010年第14期5-8,共4页Northern Horticulture

基　　金：中加合作IPNI资助项目;国家"十一五"科技支撑计划资助项目(2006BAD15B05);河北省"十一五"科技支撑计划资助项目(06220901D)

摘　　要：在冀西北高寒区草甸栗钙土农田,以白萝卜‘春雪圣’品种为材料,研究了钾肥不同施用量对白萝卜养分吸收及产量形成的影响。结果表明:以肉质根为核心的白萝卜鲜重增长呈现典型的Logistic曲线特征,而其干重则表现近线性增长。在施钾0～225 kg/hm2范围内,钾肥对白萝卜的增产效应不明显,相应对植株生长与光合色素等指标的影响亦不显著。自肉质根膨大期后白萝卜生物量快速积累,不同施钾量下株体特别是根部的钾素含量表现稳定的浓度特征。白萝卜在冀西北高寒区表现出极好的生态适应性与钾素利用的经济性。The effects of potassium application on nutrient absorption dynamics and biomass of radish named ＇Chunxuesheng＇ were studied in meadow-chestnut soil of northwest plateau of Hebei province.The results showed that the core of root fresh weight of radish growth showed typical features of logistics curve,while almost a linear increase in dry weight.Potassium fertilizer can not significantly increase the radish biomass by 0～225% kg/hm2;the effect of corresponding index of plant growth and photosynthetic pigments and others was not significant.Since the fleshy root enlargement period biomass accumulated rapidly,different amount of potassium,especially potassium content in the roots of the performance showed characteristics of a stable concentration.Radish in the alpine zone in northwestern Hebei Province showed excellent ecological adaptability and potassium utilization economy.

关 键 词：白萝卜 钾素 吸收动态 生物产量 

分 类 号：S631.1[农业科学—蔬菜学]